144522385921 has 9 divisors (see below), whose sum is σ = 149689181161. Its totient is φ = 139528210864.

The previous prime is 144522385867. The next prime is 144522385933. The reversal of 144522385921 is 129583225441.

The square root of 144522385921 is 380161.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1275275521 + 143247110400 = 35711^2 + 378480^2 .

It is not a de Polignac number, because 144522385921 - 2⁹ = 144522385409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144522385321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11018115 + ... + 11031223.

Almost surely, 2^144522385921 is an apocalyptic number.

144522385921 is the 380161-st square number.

144522385921 is the 190081-st centered octagonal number.

It is an amenable number.

144522385921 is a deficient number, since it is larger than the sum of its proper divisors (5166795240).

144522385921 is an frugal number, since it uses more digits than its factorization.

144522385921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26276 (or 13138 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The spelling of 144522385921 in words is "one hundred forty-four billion, five hundred twenty-two million, three hundred eighty-five thousand, nine hundred twenty-one".